Pumps are basic components in most technical processes, like in power and chemical industries, mineral and mining, manufacturing, heating, air conditioning and cooling of engines. They are mostly driven by electrical motors or by combustion engines and consume a high percentage of electrical energy. One distinguishes mainly centrifugal pumps for high deliveries with lower pressures and hydrostatic or positive displacement (reciprocating) pumps for high pressures and small deliveries. They transport pure liquids, or mixtures of liquids and solids and herewith increase the pressure to compensate, e.g. for resistance losses or enabling thermodynamic cycles.